JPS5576100A - Production of electrode for aluminum electrolytic capacitor - Google Patents

Production of electrode for aluminum electrolytic capacitor

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Publication number
JPS5576100A
JPS5576100A JP14968278A JP14968278A JPS5576100A JP S5576100 A JPS5576100 A JP S5576100A JP 14968278 A JP14968278 A JP 14968278A JP 14968278 A JP14968278 A JP 14968278A JP S5576100 A JPS5576100 A JP S5576100A
Authority
JP
Japan
Prior art keywords
expansion rate
surface expansion
foil
pits
sulfuric acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14968278A
Other languages
Japanese (ja)
Inventor
Tadashi Yamazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP14968278A priority Critical patent/JPS5576100A/en
Publication of JPS5576100A publication Critical patent/JPS5576100A/en
Pending legal-status Critical Current

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  • ing And Chemical Polishing (AREA)

Abstract

PURPOSE: To form an aluminum electrode foil of a high surface expansion rate and tensile strength by letting sulfuric acid exist in a high-concentration high-temperature hydrochloric acid solution ans applying DC electrolytic etching under the specific conditions.
CONSTITUTION: At the time of expanding the surface area of an Al metal foil through electrolytic etching, sulfuric acid is added at 0.1W0.3% into the bath of HCl concentrations 3W15%, and while the solution temperature is being maintained at 80°C or more, the foil is pretreated by using the electric quantity of DC 2W30 Coulomb/cm2, after which it is subjected to deep etching at current density 0.02W 0.1A/cm2 DC at the same temperature, whereby the pits of diameters made 4 timers larger than those by conventional methods are formed. Because of this, the decrease in surface expansion rate in the high pressure region is small and since the shape of the pits becomes perpendicular and regular cylindrical form, the surface expansion rate becomes extremely high.
COPYRIGHT: (C)1980,JPO&Japio
JP14968278A 1978-12-05 1978-12-05 Production of electrode for aluminum electrolytic capacitor Pending JPS5576100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14968278A JPS5576100A (en) 1978-12-05 1978-12-05 Production of electrode for aluminum electrolytic capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14968278A JPS5576100A (en) 1978-12-05 1978-12-05 Production of electrode for aluminum electrolytic capacitor

Publications (1)

Publication Number Publication Date
JPS5576100A true JPS5576100A (en) 1980-06-07

Family

ID=15480504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14968278A Pending JPS5576100A (en) 1978-12-05 1978-12-05 Production of electrode for aluminum electrolytic capacitor

Country Status (1)

Country Link
JP (1) JPS5576100A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5766620A (en) * 1980-10-13 1982-04-22 Showa Aluminium Co Ltd Method of etching aluminum foil for electrolytic conddnser electrode
JPS5766616A (en) * 1980-10-13 1982-04-22 Showa Aluminium Co Ltd Method of producing alumihum foil for electrolytic condenser electrode
US4840713A (en) * 1987-05-26 1989-06-20 Hoechst Aktiengesellschaft Process for the electrochemical roughening of aluminum for use in printing plate supports

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5766620A (en) * 1980-10-13 1982-04-22 Showa Aluminium Co Ltd Method of etching aluminum foil for electrolytic conddnser electrode
JPS5766616A (en) * 1980-10-13 1982-04-22 Showa Aluminium Co Ltd Method of producing alumihum foil for electrolytic condenser electrode
US4840713A (en) * 1987-05-26 1989-06-20 Hoechst Aktiengesellschaft Process for the electrochemical roughening of aluminum for use in printing plate supports

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